Panniculitis is an inflammation within adipose tissue and most commonly affects the subcutaneous fat. Frequently, the panniculitis is associated with certain drugs and systemic diseases, such as various rheumatologic diseases, idiopathic Weber-Christian disease, infection and malignancy. Panniculitis in dermatomyositis (DM) is most commonly an incidental histopathologic finding that less commonly manifests a clinical component. We report the case of a woman with DM who presented with panniculitis as a clinical finding. A 51-year-old woman was admitted to our hospital with diffuse nodular, indurated, painful erythematous plaques on buttocks, back and chest. 18-months ago, she had been diagnosed DM at our hospital. Her medication on admission was azathioprine. High-dose glucocorticoid was prescribed after the diagnosis of lobular panniculitis confirmed by skin biopsy. After then, the patient was getting better and discharged with the medication tapered.